Canon and its changes | Good Life Wine and Spirits
Something that emits light is known as a light source.
Light sources can be divided into natural light sources, such as the sun, stars, lightning, and bioluminescence, and artificial light sources, including incandescent lighting, fluorescent lighting, and sodium lamps. They can also be categorized by their light intensity characteristics, i.e., constant light sources that emit the same amount of light over a fixed period of time (for example, the sun and incandescent lighting) and light sources that vary over time. Fluorescent lighting may appear to be constant, but it actually changes in accordance with the frequency of the power source. The human eye is just not capable of detecting such fast variations.
The Eight Trigrams, the Canon of Changes, and Tally Divination
21. In order that the Christian people may more certainly derive an abundance of graces from the sacred liturgy, holy Mother Church desires to undertake with great care a general restoration of the liturgy itself. For the liturgy is made up of immutable elements divinely instituted, and of elements subject to change. These not only may but ought to be changed with the passage of time if they have suffered from the intrusion of anything out of harmony with the inner nature of the liturgy or have become unsuited to it.
94. That the day may be truly sanctified, and that the hours themselves may be recited with spiritual advantage, it is best that each of them be prayed at a time which most closely corresponds with its true canonical time.